Security - Security Concepts

Security Concepts

Certain concepts recur throughout different fields of security:

• Assurance - assurance is the level of guarantee that a security system will behave as expected
• Countermeasure - a countermeasure is a way to stop a threat from triggering a risk event
• Defense in depth - never rely on one single security measure alone
• Exploit - a vulnerability that has been triggered by a threat - a risk of 1.0 (100%)
• Risk - a risk is a possible event which could cause a loss
• Threat - a threat is a method of triggering a risk event that is dangerous
• Vulnerability - a weakness in a target that can potentially be exploited by a security threat